PHOENIX (AP) - A judge held two hearings in a courtroom packed with spectators and top Arizona officials Thursday on whether the state's new immigration law should take effect amid a flurry of legal challenges against the crackdown. Arizona Gov. Jan Brewer attended the second hearing, as did the U.S. Attorney for Arizona, Dennis Burke. Judge Susan Bolton did not issue a ruling at the end of the first hearing. The afternoon hearing focused on the U.S. Justice Department requesting a preliminary injunction blocking key sections of the law from taking effect next week. During the morning hearing, Bolton told lawyers for the American Civil Liberties Union that she's required to consider blocking only parts of the law, not the entire statute as they had requested. She said the law has a section allowing parts to still take effect even if other parts are struck down. ACLU attorney Omar Jadwat said the law's provisions are supposed to work together to achieve a goal of prodding illegal immigrants to leave the state. He called it unconstitutional and dangerous. Most of the controversy about the law centers on provisions related to stops and arrests of people, new crimes related to illegal immigrants, and a requirement that immigrants carry and produce their immigration papers. Other parts of the law getting little attention deal with impoundment of vehicles and sanctions against employment of illegal immigrants. Attorney John Bouma, who represents Brewer, told Bolton that those challenging the law haven't demonstrated that anyone would suffer actual harm if it takes effect, and that facts - not conjecture - must be shown. "In Arizona we have a tremendous Hispanic heritage. To think that everybody that's Hispanic is going to be stopped and questioned ... defies reality," Bouma said. "All this hypothetical that we're going to go out and arrest everybody that's Hispanic, look around. That's impossible."